One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,6,7)(3,5,9,13)(4,8,11,14)(10,12,15,16)(17,18)(19,21)(20,24)(22,25)(23,26)(27,29)(28,30)(31,32)(33,34,38,39)(35,37,41,46)(36,40,44,47)(42,45,48,43)(4,11)(8,14)(10,15)(12,16)(17,19,23,20)(18,24,26,21)(22,27,31,28)(25,30,32,29)(33,35)(34,37)(36,42)(38,41)(39,46)(40,45)(43,47)(44,48)(2,7)(3,9)(8,14)(10,15)(34,39)(35,41)(40,47)(42,48) involution — undirected(1,3)(2,5)(4,10)(6,9)(7,13)(8,12)(11,15)(14,16)(17,20,23,19)(18,24,26,21)(22,28,31,27)(25,30,32,29)(33,34)(35,37)(36,40)(38,39)(41,46)(42,45)(43,48)(44,47)(1,4,6,11)(2,8,7,14)(3,10,9,15)(5,12,13,16)(17,21,23,24)(18,19,26,20)(22,30,31,29)(25,28,32,27)(33,36,38,44)(34,40,39,47)(35,42,41,48)(37,45,46,43)(1,5)(2,3)(4,12)(6,13)(7,9)(8,10)(11,16)(14,15)(17,22,23,31)(18,25,26,32)(19,27,20,28)(21,29,24,30)(33,37)(34,35)(36,43)(38,46)(39,41)(40,48)(42,47)(44,45)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.